Packaging bag sealing and barrier performance also need to pay attention to
Barrier properties of coffee packaging bags/sustainable development
The packing bag must be sealed to ensure the freshness of the coffee beans. Check whether the packing bag is equipped with a one-way intake valve to know its sealing effect. Coffee is very sensitive to outside influences, so first you need to set up a barrier for the bag. This will help protect the bag from oxygen, UV rays and other factors. Many standing coffee bags today have a three-layer sheet of metal or pure aluminum.
Alternatively, you can opt for a double layer of high barrier polyester laminate, which keeps the beans fresh and is made of 100% plastic — including one-way intake valves and seals. These bags can be recycled in most northern European countries. To prevent UV rays from entering the bag as much as possible, consider black or white polyester or printed with dense patterns.
The tightness of the coffee bag
While bagged coffee quickly loses its flavor when opened, ziplock bags keep beans fresh. Users need to note that when pulling the seal, it is best to drain the air inside first. A bag without a seal is suitable for small amounts of the same kind of items, which means it is more suitable for retail use or household use with low consumption. When choosing a zip-lock bag, pay attention to the quality of the seal. This will ensure the freshness of the coffee and allow users to use up every bean.
